Go Back   Subaru Impreza Forum - WRX STI Rally Performance Tuning > Subaru Impreza Technical Area > Technical General

Subaru Impreza Forum

Strange leaking, foghorn noise on boost..... Help!!
LinkBack Thread Tools Display Modes
Old 03 Feb 2009, 06:08 PM   #1 (permalink)
Fresh Scooby
Join Date: Dec 2008
Posts: 15
Strange leaking, foghorn noise on boost..... Help!!

Hi guys

ok so I have a 02 impreza and I have changed all intercooler, turbo hoses for silicone ones as I get this huge leaking sound on boost..... Also changed the dump valve as someone thought it might be that but its still there.

Basically when it hits boost it sounds like boost is leaking then a deep foghorn type sound come from it and sometimes it stinks of fuel.....

I thought it would have been a pipe that had a leak but ive changed everything...

Any ideas please?

Any tips as to try to find out what it is??? I love the car just want to find out what is wrong with it or where its leaking air from....


Offline   Reply With Quote
Old 03 Feb 2009, 07:30 PM   #2 (permalink)
Obsessed Scooby
stiimpreza1984's Avatar
Join Date: Jul 2008
Location: Cork, Ireland
Posts: 7,475
Re: Strange leaking, foghorn noise on boost..... Help!!

Could be the fuel pressure regulator theirs a vacuum pipe on that back to intake manifold it prob not it but worth a try this vacuum pipe carries excess fuel vapour back into manifold so that could be smell off fuel you getting if it cut and the back pressure from this regulator could cause this noise if they a hole or cut on that vacuum pipe on the fuel pressure regulator worth a try heres a pic, mine is on the end off the fuel rail towards back of engine drivers side by turbo know you have the 02impreza this is on my sti v6 classic should look nearly the same have a look at vacuum pipe hopefully that your problem look at the blue arrow this the vacuum pipe back to manifold

Last edited by stiimpreza1984; 08 Mar 2009 at 01:30 AM.
Offline   Reply With Quote
Old 03 Feb 2009, 07:34 PM   #3 (permalink)
Fresh Scooby
Join Date: Dec 2008
Posts: 15
Re: Strange leaking, foghorn noise on boost..... Help!!

Hi mate

at the moment I will try anything as ive tried everything so worth a look.

Just want to enjoy my scooby.......

Offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Stange loud noise when on boost.... spadey99 Technical General 4 16 Jan 2009 10:43 PM
Strange noise when revving DJBenz Subaru Impreza Discussions 3 10 Oct 2008 08:47 AM
strange boost problem! doc__dave Engine Bay 11 30 Aug 2007 07:09 PM
strange noise from turbo WRX4ME Engine Bay 14 01 Mar 2007 09:18 PM
04WRX Strange Noise at 64 (ish) mph skylight Subaru Impreza Discussions 28 20 Nov 2004 06:49 PM

All times are GMT. The time now is 02:50 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.